In Presidential Election Campaigns, Many Television Ads Focus on the "Negatives

In presidential election campaigns, many television ads focus on the "negatives" of an opponent. Campaign managers are obviously aware that when people are forming impressions,

A) they tend to give others the benefit of the doubt.
B) self-serving biases are often influential.
C) negative information tends to be more important than positive information.
D) they tend to believe what they see and hear on television over what they read in newspapers and hear on the radio.